Improvement in machines for crozing staves



H. BRADSHAW.

lmprrovement in Machines for Crozing Staves.

Patented June 6,1871.

AM. PHDra'urHocfuff/i: ca Mxosaamsk merma).

v 3 is a cross-section of the table taken on the and D in the operation of the machine, a belt- 'arms A and. the frames C are provided'with thus shifting the rod c the distance between Y frame is vibrated the cutter will be moved in HUGH BRADSHAW, 0F CHICAGO, ILLINOIS.

IMPROVEMENT IN MACHINES FOR CROZlNG STAVES.

Specication forming part of Letters Patent No. 115,690, dated J une 6, 1871.

To all whom it may concern:

` Be it known that I, HUGH BnAnsnAw, or Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Crozing-Machines, of which the following is a speciiication, reference being had to the accompanying drawing.

My invention relates to a machine for cutting the croze in staves for barrels, tanks, dsc.; and consists in a novel combination of a rotary swinging cutter with an adjustable table for supporting the stave, as hereinafter described. 1

Figure l is a front elevation of my machine. Fig. 2 is a side elevation of the same. Fig.

line w In the drawing, A A represent two vertical hangers or arms, secured to the ceiling, and B represents a horizontal countershaft, mounted between the upper ends of the arms, and provided with pulleys a and b, the latter outside of the, arm. Between the twoarms, on a rod, c, is suspended a frame, C, having at its lower end a shaft, D, provided on one end 'with a cutter-head, E, and on the other end with a pulley, d, which is driven by a belt, e, from pulley b overhead. In or der that the belt e 4may be adjusted to suit the varying distances between the shafts B tightener, Il, constructed and arranged as shown in Fig. 2, or of any other suitable construction and arrangement, may be used. The lower end of frame C may be swung for# ward and backward'so as to move the cutterhead in the arc of a circle, while at the same time its rotary motion is continued. The

a series of transverse holes, f, into either ot' which the fulcrum-rod c may be inserted. By

the cutter-head and the fulcrum of the frame may be varied as desired, so that when the an arc oi' corresponding radius. A chain, g, provided with a weight, h, is passed over a pulley, ai, and attached to the back side of frame G so as to keeppthe same Vdrawn back,

Aand a handle, k, is secured tothe ame in such position that it may be readily grasped by the operator to draw the frame forward. Below the frame C is a rigid table, lm, to one end of which is hinged a table, G, having its outer end supported on a screw, H, so that by adjusting the screw the inclination of the table may be varied, as necessary. Crosswise of table G, vnear each end, is mounted a slide, K, provided with an arm, l, at the back end, and operated by a screw and crank, as shown in Figs. l and 3. V

In operating the machine, motion is communicated to the cutter-head through pulley l), and then the stave laid lengthwise on the bed, against the blocks of slides K, as shown in Fig. 3, and then the frame C drawn forward so as to move the rotating cutter across the end of the stave, the cutter in its passage forming the croze or groove in the stave.

When crozing the large ends of. staves for tanks largest at the bottom, the table is adjusted so as to incline upward from the cutter; but when crozing the small ends of staves for vessels largest at the top Aor middle, the table is inclined downward from the cutter, as shown.

The blocks l on the slides l: serve as rests for the staves and as gages to keep the staves in the proper position, the blocks being so adjusted as to bring the central line of the stave at right angles to the line of movement of the cutter across the same.

In using the machine on any one lot of staves,'the fulcrnm-rod should be so adjusted that the radius of the arc ldescribed by the cutter in its swinging movement is the same as the radius of the vessel in whichY the staves are to be used. When this is done ythe crozewill have its face so curved as toA top or bottom to be inserted nation with the table G provided with the 1y as described, for Iche purpose of changing sliding heads K, the Whole constructed and the line of movement of the cutter-head as arranged' to operate substantially as'and for desired.

the purpose set forth. A HUGH BRADSHAW.

2. The combination of the rod c with the Witnesses:

vertical hangers A and frame C, both being CYBUs J. CORSE,

provided with transverse holes, substantial- FR. W. WOLF. 

